[plt-scheme] [scribble] custom evaluator

You need to parameterize `sandbox-output' and `sandbox-error-output'
to 'string while callinh `make-evaluator'.

At Sat, 1 May 2010 13:17:01 -0400, Eric Tanter wrote:
> Hi again,
> 
> I'm trying to use an evaluator for interactions that uses the plai language. 
> 
> I figured out how to create such an evaluator and use it, eg.:
> #lang scheme
> (require scheme/sandbox)
> (define plai-eval (make-evaluator 'plai '(define-type Bar (bar (x number?)))))
> (plai-eval '(let ((x 10))
>               (bar x)))
> --> (bar 10)
> 
> Now, in Scribble:
> 
> #lang scribble/manual
> @(require scribble/eval)
> @(require scheme/sandbox)
> @(define plai-eval (make-evaluator 'plai '(define-type Bar (bar (x number?)))))
> @interaction[
>   #:eval plai-eval
>   (let ((x 10))
>     (bar x))]
> 
> string=?: expects type <string> as 2nd argument, given: #f; other arguments 
> were: ""
> 
>  === context ===
> /Applications/_Extra/Devel/PLT Scheme v4.2.5/collects/scribble/eval.ss:83:6: 
> loop
> /Applications/_Extra/Devel/PLT Scheme v4.2.5/collects/scribble/eval.ss:78:2: 
> interleave
> /Users/etanter/Develop/Scheme/Scribble/test2.scrbl: [running body]
> /Applications/_Extra/Devel/PLT Scheme 
> v4.2.5/collects/scheme/private/map.ss:18:11: map
> /Applications/_Extra/Devel/PLT Scheme v4.2.5/collects/scribble/run.ss: 
> [running body]
> /Applications/_Extra/Devel/PLT Scheme 
> v4.2.5/collects/scribble/tools/drscheme-buttons.ss:24:3
> /Applications/_Extra/Devel/PLT Scheme 
> v4.2.5/collects/scheme/private/more-scheme.ss:158:2: 
> call-with-break-parameterization
> /Applications/_Extra/Devel/PLT Scheme 
> v4.2.5/collects/scheme/private/more-scheme.ss:274:2: 
> call-with-exception-handler
> 
> Any idea of what I am doing wrong?
> 
> Thanks,
> 
> -- Éric
> 
> 
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